@InProceedings{chaumartin:2007:SemEval-2007,
  author    = {Chaumartin, Fran\c{c}ois-R\'{e}gis},
  title     = {UPAR7: A knowledge-based system for headline sentiment tagging},
  booktitle = {Proceedings of the Fourth International Workshop on Semantic Evaluations (SemEval-2007)},
  month     = {June},
  year      = {2007},
  address   = {Prague, Czech Republic},
  publisher = {Association for Computational Linguistics},
  pages     = {422--425},
  url       = {http://www.aclweb.org/anthology/W/W07/W07-2094}
}